package com.oss.oss.service;

import com.aliyun.oss.OSS;
import com.aliyun.oss.OSSClientBuilder;
import com.aliyun.oss.common.utils.BinaryUtil;
import com.aliyun.oss.model.MatchMode;
import com.aliyun.oss.model.PolicyConditions;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;
import org.springframework.web.bind.annotation.GetMapping;

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.LinkedHashMap;
import java.util.Map;

@Service
public class OssService {
    @Value("${spring.cloud.alicloud.oss.endpoint}")
    String endpoint;
    @Value("${spring.cloud.alicloud.access-key}")
    String accessId;
    @Value("${spring.cloud.alicloud.secret-key}")
    String secretkey;
    public Map<String, String> getOss() {
        // 阿里云账号AccessKey拥有所有API的访问权限，风险很高。强烈建议您创建并使用RAM用户进行API访问或日常运维，请登录RAM控制台创建RAM用户。
//        String accessId = "yourAccessKeyId";
//        String accessKey = "yourAccessKeySecret";
//        // Endpoint以华东1（杭州）为例，其它Region请按实际情况填写。
//        String endpoint = "oss-cn-hangzhou.aliyuncs.com";
        // 填写Bucket名称，例如examplebucket。

        String bucket = "";
        // 填写Host地址，格式为https://bucketname.endpoint。
        String host = "https://" + bucket + "." + endpoint;
        // 设置上传回调URL，即回调服务器地址，用于处理应用服务器与OSS之间的通信。OSS会在文件上传完成后，把文件上传信息通过此回调URL发送给应用服务器。
//        String callbackUrl = "https://192.168.0.0:8888";
        // 设置上传到OSS文件的前缀，可置空此项。置空后，文件将上传至Bucket的根目录下。
        String date = new SimpleDateFormat("yyyy-MM-dd").format(new Date());

        String dir = date;
        Map<String, String> respMap = null;
        // 创建ossClient实例。
        OSS ossClient = new OSSClientBuilder().build(endpoint, accessId, secretkey);
        try {
            long expireTime = 30;
            long expireEndTime = System.currentTimeMillis() + expireTime * 1000;
            Date expiration = new Date(expireEndTime);
            PolicyConditions policyConds = new PolicyConditions();
            policyConds.addConditionItem(PolicyConditions.COND_CONTENT_LENGTH_RANGE, 0, 1048576000);
            policyConds.addConditionItem(MatchMode.StartWith, PolicyConditions.COND_KEY, dir);
            String postPolicy = ossClient.generatePostPolicy(expiration, policyConds);
            byte[] binaryData = postPolicy.getBytes("utf-8");
            String encodedPolicy = BinaryUtil.toBase64String(binaryData);
            String postSignature = ossClient.calculatePostSignature(postPolicy);
            respMap = new LinkedHashMap<String, String>();
            respMap.put("accessId", accessId);
            respMap.put("policy", encodedPolicy);
            respMap.put("signature", postSignature);
            respMap.put("dir", dir);
            respMap.put("host", host);
            respMap.put("expire", String.valueOf(expireEndTime / 1000));
        } catch (Exception e) {
            // Assert.fail(e.getMessage());
            System.out.println(e.getMessage());
        }
        return respMap;
    }
}
